org.springframework.cache.caffeine

Class CaffeineCacheManager

java.lang.Object

org.springframework.cache.caffeine.CaffeineCacheManager

All Implemented Interfaces:

CacheManager

public class CaffeineCacheManager
extends Object
implements CacheManager

CacheManager implementation that lazily builds CaffeineCache instances for each getCache(java.lang.String) request. Also supports a 'static' mode where the set of cache names is pre-defined through setCacheNames(java.util.Collection<java.lang.String>), with no dynamic creation of further cache regions at runtime.

The configuration of the underlying cache can be fine-tuned through a Caffeine builder or CaffeineSpec, passed into this CacheManager through setCaffeine(com.github.benmanes.caffeine.cache.Caffeine<java.lang.Object, java.lang.Object>)/setCaffeineSpec(com.github.benmanes.caffeine.cache.CaffeineSpec). A CaffeineSpec-compliant expression value can also be applied via the "cacheSpecification" bean property.

Requires Caffeine 2.1 or higher.

Since:

4.3

Author:

Ben Manes, Juergen Hoeller, Stephane Nicoll, Sam Brannen, Brian Clozel

See Also:

CaffeineCache

Constructor Summary

Constructors

Constructor and Description
CaffeineCacheManager() Construct a dynamic CaffeineCacheManager, lazily creating cache instances as they are being requested.
CaffeineCacheManager(String... cacheNames) Construct a static CaffeineCacheManager, managing caches for the specified cache names only.

Method Summary

Modifier and Type	Method and Description
protected Cache	adaptCaffeineCache(String name, com.github.benmanes.caffeine.cache.Cache<Object,Object> cache) Adapt the given new native Caffeine Cache instance to Spring's Cache abstraction for the specified cache name.
protected Cache	createCaffeineCache(String name) Build a common CaffeineCache instance for the specified cache name, using the common Caffeine configuration specified on this cache manager.
protected com.github.benmanes.caffeine.cache.Cache<Object,Object>	createNativeCaffeineCache(String name) Build a common Caffeine Cache instance for the specified cache name, using the common Caffeine configuration specified on this cache manager.
Cache	getCache(String name) Get the cache associated with the given name.
Collection<String>	getCacheNames() Get a collection of the cache names known by this manager.
boolean	isAllowNullValues() Return whether this cache manager accepts and converts null values for all of its caches.
void	registerCustomCache(String name, com.github.benmanes.caffeine.cache.Cache<Object,Object> cache) Register the given native Caffeine Cache instance with this cache manager, adapting it to Spring's cache API for exposure through getCache(java.lang.String).
void	setAllowNullValues(boolean allowNullValues) Specify whether to accept and convert null values for all caches in this cache manager.
void	setCacheLoader(com.github.benmanes.caffeine.cache.CacheLoader<Object,Object> cacheLoader) Set the Caffeine CacheLoader to use for building each individual CaffeineCache instance, turning it into a LoadingCache.
void	setCacheNames(Collection<String> cacheNames) Specify the set of cache names for this CacheManager's 'static' mode.
void	setCacheSpecification(String cacheSpecification) Set the Caffeine cache specification String to use for building each individual CaffeineCache instance.
void	setCaffeine(com.github.benmanes.caffeine.cache.Caffeine<Object,Object> caffeine) Set the Caffeine to use for building each individual CaffeineCache instance.
void	setCaffeineSpec(com.github.benmanes.caffeine.cache.CaffeineSpec caffeineSpec) Set the CaffeineSpec to use for building each individual CaffeineCache instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CaffeineCacheManager

public CaffeineCacheManager()

Construct a dynamic CaffeineCacheManager, lazily creating cache instances as they are being requested.

CaffeineCacheManager

public CaffeineCacheManager(String... cacheNames)

Construct a static CaffeineCacheManager, managing caches for the specified cache names only.

Method Detail

setCacheNames

public void setCacheNames(@Nullable
                          Collection<String> cacheNames)

Specify the set of cache names for this CacheManager's 'static' mode.

The number of caches and their names will be fixed after a call to this method, with no creation of further cache regions at runtime.

Calling this with a null collection argument resets the mode to 'dynamic', allowing for further creation of caches again.

setCaffeine

public void setCaffeine(com.github.benmanes.caffeine.cache.Caffeine<Object,Object> caffeine)

Set the Caffeine to use for building each individual CaffeineCache instance.

See Also:

createNativeCaffeineCache(java.lang.String), Caffeine.build()

setCaffeineSpec

public void setCaffeineSpec(com.github.benmanes.caffeine.cache.CaffeineSpec caffeineSpec)

Set the CaffeineSpec to use for building each individual CaffeineCache instance.

See Also:

createNativeCaffeineCache(java.lang.String), Caffeine.from(CaffeineSpec)

setCacheSpecification

public void setCacheSpecification(String cacheSpecification)

Set the Caffeine cache specification String to use for building each individual CaffeineCache instance. The given value needs to comply with Caffeine's CaffeineSpec (see its javadoc).

See Also:

createNativeCaffeineCache(java.lang.String), Caffeine.from(String)

setCacheLoader

public void setCacheLoader(com.github.benmanes.caffeine.cache.CacheLoader<Object,Object> cacheLoader)

Set the Caffeine CacheLoader to use for building each individual CaffeineCache instance, turning it into a LoadingCache.

See Also:

createNativeCaffeineCache(java.lang.String), Caffeine.build(CacheLoader), LoadingCache

setAllowNullValues

public void setAllowNullValues(boolean allowNullValues)

Specify whether to accept and convert null values for all caches in this cache manager.

Default is "true", despite Caffeine itself not supporting null values. An internal holder object will be used to store user-level nulls.

isAllowNullValues

public boolean isAllowNullValues()

Return whether this cache manager accepts and converts null values for all of its caches.

getCacheNames

public Collection<String> getCacheNames()

Description copied from interface: CacheManager

Get a collection of the cache names known by this manager.

Specified by:

getCacheNames in interface CacheManager

Returns:

the names of all caches known by the cache manager

getCache

@Nullable
public Cache getCache(String name)

Description copied from interface: CacheManager

Get the cache associated with the given name.

Note that the cache may be lazily created at runtime if the native provider supports it.

Specified by:

getCache in interface CacheManager

Parameters:

name - the cache identifier (must not be null)

Returns:

the associated cache, or null if such a cache does not exist or could be not created

registerCustomCache

public void registerCustomCache(String name,
                                com.github.benmanes.caffeine.cache.Cache<Object,Object> cache)

Register the given native Caffeine Cache instance with this cache manager, adapting it to Spring's cache API for exposure through getCache(java.lang.String). Any number of such custom caches may be registered side by side.

This allows for custom settings per cache (as opposed to all caches sharing the common settings in the cache manager's configuration) and is typically used with the Caffeine builder API: registerCustomCache("myCache", Caffeine.newBuilder().maximumSize(10).build())

Note that any other caches, whether statically specified through setCacheNames(java.util.Collection<java.lang.String>) or dynamically built on demand, still operate with the common settings in the cache manager's configuration.

Parameters:

name - the name of the cache

cache - the custom Caffeine Cache instance to register

Since:

5.2.8

See Also:

adaptCaffeineCache(java.lang.String, com.github.benmanes.caffeine.cache.Cache<java.lang.Object, java.lang.Object>)

adaptCaffeineCache

protected Cache adaptCaffeineCache(String name,
                                   com.github.benmanes.caffeine.cache.Cache<Object,Object> cache)

Adapt the given new native Caffeine Cache instance to Spring's Cache abstraction for the specified cache name.

Parameters:

name - the name of the cache

cache - the native Caffeine Cache instance

Returns:

the Spring CaffeineCache adapter (or a decorator thereof)

Since:

5.2.8

See Also:

CaffeineCache, isAllowNullValues()

createCaffeineCache

protected Cache createCaffeineCache(String name)

Build a common CaffeineCache instance for the specified cache name, using the common Caffeine configuration specified on this cache manager.

Delegates to adaptCaffeineCache(java.lang.String, com.github.benmanes.caffeine.cache.Cache<java.lang.Object, java.lang.Object>) as the adaptation method to Spring's cache abstraction (allowing for centralized decoration etc.), passing in a freshly built native Caffeine Cache instance.

Parameters:

name - the name of the cache

Returns:

the Spring CaffeineCache adapter (or a decorator thereof)

See Also:

adaptCaffeineCache(java.lang.String, com.github.benmanes.caffeine.cache.Cache<java.lang.Object, java.lang.Object>), createNativeCaffeineCache(java.lang.String)

createNativeCaffeineCache

protected com.github.benmanes.caffeine.cache.Cache<Object,Object> createNativeCaffeineCache(String name)

Build a common Caffeine Cache instance for the specified cache name, using the common Caffeine configuration specified on this cache manager.

Parameters:

name - the name of the cache

Returns:

the native Caffeine Cache instance

See Also:

createCaffeineCache(java.lang.String)